ConstraintLayoutTag.kt
/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.constraintlayout.compose
import androidx.compose.runtime.Immutable
import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.Measurable
import androidx.compose.ui.layout.ParentDataModifier
import androidx.compose.ui.layout.layoutId
import androidx.compose.ui.platform.InspectorInfo
import androidx.compose.ui.platform.InspectorValueInfo
import androidx.compose.ui.platform.debugInspectorInfo
import androidx.compose.ui.unit.Density
fun Modifier.layoutId(layoutId: String, tag: String) = this.then(
ConstraintLayoutTag(
constraintLayoutId = layoutId,
constraintLayoutTag = tag,
inspectorInfo = debugInspectorInfo {
name = "constraintLayoutId"
value = layoutId
}
)
)
@Immutable
private class ConstraintLayoutTag(
override val constraintLayoutTag: String,
override val constraintLayoutId: String,
inspectorInfo: InspectorInfo.() -> Unit
) : ParentDataModifier, ConstraintLayoutTagParentData, InspectorValueInfo(inspectorInfo) {
override fun Density.modifyParentData(parentData: Any?): Any? {
return this@ConstraintLayoutTag
}
override fun hashCode(): Int =
constraintLayoutTag.hashCode()
override fun equals(other: Any?): Boolean {
if (this === other) return true
val otherModifier = other as? ConstraintLayoutTag ?: return false
return constraintLayoutTag == otherModifier.constraintLayoutTag
}
override fun toString(): String =
"ConstraintLayoutTag(id=$constraintLayoutTag)"
}
interface ConstraintLayoutTagParentData {
val constraintLayoutId: String
val constraintLayoutTag: String
}
val Measurable.constraintLayoutTag: Any?
get() = (parentData as? ConstraintLayoutTagParentData)?.constraintLayoutTag
val Measurable.constraintLayoutId: Any?
get() = (parentData as? ConstraintLayoutTagParentData)?.constraintLayoutId